Pediatric and geriatric endocrinology are two specialized branches of endocrinology that focus on the unique hormonal challenges and disorders experienced by children and older adults. Pediatric endocrinology primarily deals with hormonal disorders in children and adolescents. Hormonal imbalances during growth and development can have a significant impact on a child's overall health, growth and sexual development. Some of the conditions which are studied and treated under pediatric endocrinology are growth disorders, childhood diabetes (Type 1 and Type 2), thyroid disorders, puberty disorders, adrenal gland disorders and disorders of sexual development. Geriatric endocrinology, on the other hand, focuses on the hormonal changes and disorders that occur in older adults. It involves managing conditions such as menopause and osteoporosis. It also involves diabetes management in older adults, thyroid disorders, adrenal disorders, and hormone-related issues affecting cognitive function and mood. This book provides comprehensive insights into the field of pediatric and geriatric endocrinology. It will serve as a valuable source of reference for graduate and postgraduate students.